Given the table
sales(date, amount) ordered by
date, what is the output of this query?
SELECT date, amount, SUM(amount) OVER (ORDER BY date ROWS BETWEEN 1 PRECEDING AND CURRENT ROW) AS running_sum FROM sales;
Assuming data:
date | amount
2024-01-01 | 100
2024-01-02 | 200
2024-01-03 | 300A[{"date": "2024-01-01", "amount": 100, "running_sum": 300}, {"date": "2024-01-02", "amount": 200, "running_sum": 500}, {"date": "2024-01-03", "amount": 300, "running_sum": 600}]
B[{"date": "2024-01-01", "amount": 100, "running_sum": 100}, {"date": "2024-01-02", "amount": 200, "running_sum": 200}, {"date": "2024-01-03", "amount": 300, "running_sum": 300}]
C[{"date": "2024-01-01", "amount": 100, "running_sum": 100}, {"date": "2024-01-02", "amount": 200, "running_sum": 300}, {"date": "2024-01-03", "amount": 300, "running_sum": 500}]
D[{"date": "2024-01-01", "amount": 100, "running_sum": null}, {"date": "2024-01-02", "amount": 200, "running_sum": 300}, {"date": "2024-01-03", "amount": 300, "running_sum": 500}]
